Use the drop-down menus to complete the statements. A vertical column of elements in the periodic table is called a ____ . A hor
izontal row of elements in the periodic table is called a ____ . Atoms of elements in the same group have the same ____ . As you move from left to right on the periodic table, the atomic number ____ .
When we move in a periodic table from top to bottom or vice versa along a vertical column , it is said that we are moving along a "group" in a periodic table.
Like wise when we move in a periodic table from left to right or right to left in a horizontal row , it is said that we are moving along a "period" in a periodic table.
The classification of elements belonging to any specific group of periodic table is dependent on the total number of valence electron. All elements of with in a group have same number of valence electrons however, the orbitals may change.
The atomic number increases while moving from left to right as the number of orbitals in which the valence electron is found also increase in the same direction.
The first experiment of the passage shows that treatment with TGFBR1 and TGFBR2 antagonists led to lower levels of epithelial cell production. For this conclusion to be strongly valid, we want to show a positive correlation between TGFBR activity and epithelial proliferation.
The correct answer is <u /><em>a</em><em>daption</em>. The particular environment in which a particular environment is exposed to gives it the characteristic or the ability to adapt. This is how a particular ecosystem works. It is the relationship of organisms within their environment that evolves through time in order for it to survive and propagate into more adapted kinds of species.
